Flaky Test TestChannelStore/GetChannelsByScheme

Description

```
— FAIL: TestChannelStore/MySQL/GetChannelsByScheme (0.00s)
require.go:765:
Error Trace: channel_store.go:3045
channel_store.go:77
Error: Expected nil, but got: &model.AppError{Id:"store.sql_scheme.save.update.app_error", Message:"store.sql_scheme.save.update.app_error", DetailedError:"no record to update", RequestId:"", StatusCode:500, Where:"SqlSchemeStore.Save", IsOAuth:false, params:map[string]interface {}(nil)}
Test: TestChannelStore/MySQL/GetChannelsByScheme
```

QA Test Steps

No testing required.

Mana

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Assignee

Maria Nuñez

QA Assignee

Prapti Shrestha

Reporter

George Goldberg

Epic Link

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Fix versions

Mattermost Team

Sustained Engineering

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